JPS60189850A - Image display device - Google Patents

Abstract

PURPOSE:To prevent defects in the image such as color nonuniformity, lateral lines and black spots by using connection spacers formed by an insulating material and connecting the electrode and the connection spacer by laser welding. CONSTITUTION:For electron-beam-current-controlling electrodes, horizontally deflecting electrodes or other electrodes as well, connection spacers 26 formed by an insulating material such as glass are used and the electrode and the connection spacer 36 for each unit are jointed together by laser 37 or similar method. After thus forming each unit, the electrodes are mechanically supported. As a result, the adhesive strength is improve without using any frit, thereby equalizing the accuracy and preventing any color nonuniformity. Furthermore, any separation of the frit powder and generation of black spots are prevented and no heat cycle is applied, thereby preventing any defective lateral line and defective image.

Description

DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to an image display device for video equipment.

Conventional configurations and their problems Traditionally, cathode ray tubes have been mainly used as display elements for displaying color television images, but conventional cathode ray tubes have a much longer depth than the screen, making it difficult to use for thin TVs. It was impossible to tear apart John's receiver.

In addition, a flat plate-like display main 711/dankiro υi main two main 7-
Many excellent liquid crystal display devices have been developed, but
All of them are insufficient in terms of performance such as brightness, contrast, and color reproducibility of color display, and have not been put into practical use. Therefore, we aimed to achieve a device that can display color television images on a flat display device using electron beams, and we divided the screen on the screen vertically into multiple sections. The electron beam is deflected vertically for each line to display multiple lines, and then divided horizontally into multiple sections to display R, G, and G signals for each section.
, B, etc. are made to emit light sequentially, and the R, G
, B, and the like is controlled by a color video signal to display a television image as a whole. As shown in FIG. 1, a conventional image display element has a back electrode 1, a line cathode 2 as an electron beam source, and a back electrode 1, a line cathode 2 as an electron beam source, and
, vertical focusing electrodes 3, 3', vertical deflection electrode 4, electron beam flow control electrode 5, horizontal focusing electrode 6, horizontal deflection electrode 7, horizontal focusing electrode d, electron beam accelerating electrode 8, and glass container 9.
, 22 are arranged, and the components are housed in the glass container and evacuated. The pole 2 of #jl+ as an electron beam source is stretched horizontally so as to generate an electron beam distributed linearly in the horizontal direction, and a plurality of such line cathodes 2 are connected vertically at appropriate intervals. (Here, only four, 2i to 22, are shown). In this example, it is assumed that 16 are provided, and 2-2
Let's do it. These line cathodes 2 have a thickness of 10 to 20 μm, for example.
An oxide cathode material is coated on the surface of a tungsten wire of φ. Then, as will be described later, the electron beams are controlled to be emitted sequentially from the upper line cathode 2a for a fixed period of time. The back electrode 1 suppresses the generation of electron beams from line cathodes 2 other than the line cathode 2 that is controlled to emit electron beams for a certain period of time, which will be described later, and directs the generated electron beams only in the forward direction. It has the effect of pushing out toward the target.

The back electrode 1 may be formed by a coating film of conductive material adhered to the inner surface of the rear wall of the glass bulb. Further, instead of the back electrode 1 and the linear cathode 2, a planar electron beam emitting cathode may be used. The vertical focusing electrode 3 is a conductive plate 11 having horizontally long slits 10 facing each of the line cathodes 2a to 2yo, and takes out the electron beam emitted from the line cathode 2 through the slits 10. , and vertically focused. The slits 10 may be provided with crosspieces at appropriate intervals in the middle, or at small intervals of b in the horizontal direction (the intervals are such that they almost touch each other).
The through hole may be substantially configured as a slit by a row of a large number of through holes arranged side by side. The vertical focusing electrode 3' is also similar. The vertical deflection electrode 4 has the above-mentioned slit) 10
A plurality of insulating substrates 12 are arranged horizontally at intermediate positions, and conductors 13 and 13' are provided on the upper and lower surfaces of an insulating substrate 12, respectively. Then, a vertical deflection voltage is applied between the opposing conductors 13 and 13' to deflect the electron beam in the vertical direction.

In this configuration example, the pair of conductors 13 and 13'
The electron beam from the book line cathode 2 is vertically deflected to a position corresponding to 16 lines. And 16 vertical deflection electrodes 4
Thus, 15 conductor pairs corresponding to each of the 16 wire cathodes 2 are constructed, and in the end, 24 conductor pairs are formed on the screen 21.
The electron beam is deflected so as to draw a zero horizontal line.

Next, the electron beam flow control electrodes 6 are composed of conductive plates 15 each having a vertically long slit 14, and a plurality of electron beam flow control electrodes 6 are arranged horizontally in parallel at predetermined intervals.

In this configuration example, 320 control electrode conductive plates 16a to 1
6n are provided (only 10 are shown in the figure)
. Each of the electron beam flow control electrodes 5 divides the electron beam horizontally into one picture element and takes out the electron beam, and controls the amount of electron beam passing therethrough according to the video signal for displaying each picture element. . Therefore, the electron beam flow control electrode 6
If 32020 pixels are provided, 320 picture elements can be displayed per horizontal line. Furthermore, in order to display images in color, each picture element is displayed with phosphors of three colors R, G, and H, and each electron beam flow control electrode 6 is
Each video signal is sequentially i+n4+"-ame1 → 4Q Tsun's buds Ebihito 11 addition electrode 5 has 320 pixels for one line.
Two sets of video signals are applied simultaneously, and one line of video is displayed at one time. The horizontal focusing electrode 6 is composed of a conductive plate 17 having a plurality of vertically long slits 16 (320 slits 16) facing the slits 14 of the electron beam flow control electrode 5, and each of the horizontally divided picture elements Each electron beam is focused horizontally into a fine electron beam. A plurality of horizontal deflection electrodes 7 are electrically conductive plates 1 arranged vertically at intermediate positions between the slits 16.
8, a horizontal deflection voltage is applied between each of them to deflect the electron beam of each picture element in the horizontal direction, and the R, G, and H phosphors are displayed on the screen 21. are sequentially irradiated to emit light. The deflection range is
In this embodiment, each electron beam has a width of one picture element.

The acceleration electrode 8 is composed of a plurality of conductive wires 19 provided horizontally at the same position as the vertical deflection electrode 4.
The electron beam is accelerated to collide with the screen 21 with sufficient energy. The screen 21 is constructed by coating the back surface of the glass container 9 with a phosphor 20 that emits light when irradiated with an electron beam, and adding a metal back layer (not shown). The phosphor 2° corresponds to one slit 14 of the electron beam flow control electrode 5, that is, to each one electron beam divided in the water direction.
Pairs of phosphors of three colors, 9 and H, are provided and are applied in stripes in the vertical direction. In FIG. 1, broken lines drawn on the screen 21 indicate divisions in the vertical direction that are displayed corresponding to each of the plurality of line cathodes 2, and two-dot chain lines indicate each of the plurality of electron beam flow control electrodes 5. Shows the horizontal divisions displayed corresponding to. As shown in the enlarged view in Fig. 2, one section partitioned by these two has R, G, and B phosphors 20 for one pixel in the horizontal direction, and 16 lines in the vertical direction. It has a width of In the figure, A is one section in the vertical direction, and B is one section in the horizontal direction.
It is a classification. The size of one section is, for example, 11 Jm in the horizontal direction and 16 Jm in the vertical direction. Note that in FIG. 1, the length in the horizontal direction is greatly expanded relative to the vertical direction to make it easier to see. However, in this embodiment, R for one electron beam flow control electrode 6, that is, for one electron beam.
, G, and H are provided in one pair for one picture element, but it is of course possible to provide two or more picture elements. The R, G, and B video signals for the picture elements described above are sequentially added, and horizontal deflection is performed in synchronization with this. The above is the general principle of the image display device. Next, a method for manufacturing the above device will be explained with reference to FIG. The horizontal deflection electrode 7 from the back electrode 1 is fixed to each other at a predetermined distance and positioned in the in-plane direction of the electrodes by a coupling spacer 23 made of a metal material, and then housed in a glass container to display an image. The device is completed. Here, the positioning of the electrodes in the in-plane direction is 1, 2, 3. -3', 4. This is done using a positioning hole 24 that is accurately drilled in each of the cs, a, and y electrodes, an electron beam source holding means, and an accelerating electrode holding means (both not shown), and a positioning pin 26 that commonly passes through the positioning hole 24. When fixing each electrode, due to the manufacturing process, a method is adopted in which the horizontal deflection electrode from the electron beam flow control electrode is divided into several units, and after the units are fixed, the units are fixed together. ing. This is because the electron beam control electrode unit and the horizontal deflection electrode unit constitute electrical electrodes, and therefore must be divided into a part to which a 10 charge is applied and a part to which a negative charge is applied. However, since these patterns have extremely small slit widths and extremely thin plate thicknesses, it is difficult to fix them by firing in a divided state. Therefore, the electron beam flow control electrode and the horizontal deflection electrode are usually baked and fixed to form a unit, and then the stain pole pattern is divided by a method such as a laser. A conventional electron beam flow control electrode unit includes an electron beam flow control electrode 26 and a vertical focusing electrode 270 using a 42-6 alloy, as shown in Fig. 4.
The electron beam flow control unit is completed by interposing a bonding spacer 23 made of the same <42-6 alloy and firing and fixing it with a frit, but the electron beam flow control electrode 26 and vertical focusing electrode 27 are In order to apply a The unit is completed by applying adhesive 29 and firing it. However, with this conventional method, thickness unevenness occurs due to the application of the insulating layer and the adhesive frit, which results in uneven thickness accuracy and results in uneven thickness even after firing. The problems include uneven color, weak adhesive strength between the adhesive frit and the metal surface, and adhesive frit powder falling off during handling. Appears as a black spot.

Furthermore, when the adhesive frit is fired, a heat cycle of 450°C for 1 hour is not applied, resulting in errors in the mutual positional accuracy of electrode glue or electrode slits due to the difference in thermal expansion between the metal and the adhesive frit, resulting in uneven coloring, horizontal lines, and other problems in the image. It had many drawbacks, including defects, the need for gradient plating to prevent oxidation, and increased costs due to the number of steps required for thermal cycles.

Purpose of the Invention In view of the above-mentioned drawbacks, the present invention provides an inexpensive image display free of image defects such as color unevenness, horizontal lines, and black dots by using the Yuya spacer itself as an insulator and bonding the electrode and the coupling spacer by laser welding. The aim is to supply equipment in large quantities.

Structure of the Invention In the image display device of the present invention, the electrode and the coupling spacer are bonded to each other in the electron beam flow control electrode, the horizontal deflection electrode, or other electrodes by using the coupling spacer as an insulator such as glass, and in each unit, the electrode and the spacer are connected to each other. are bonded together using a method such as a laser, and multiple electrodes are mechanically held after each unit and saw, improving adhesive strength and ensuring uniform thickness accuracy as no frit is used. There is no color unevenness, there is no frit powder falling off, there are no black spots, there is no heat cycling, there are no blemishes, there are no horizontal line defects, and very beautiful images can be obtained, and there is no heat cycling. Since there is no need to apply Aq plating to prevent oxidation, there is no need for Aq plating to prevent oxidation, resulting in a unique effect of reducing costs.

DESCRIPTION OF EMBODIMENTS The image display device of the present invention will be described below with reference to the drawings. 5 to 9 show an image display device according to an embodiment of the present invention, and FIG. 6 is a plan view,
FIG. 6 is a sectional view of its horizontal portion, and in FIGS.
A glass bonding spacer 36 manufactured by a method such as etching, leaving only the side part and the peripheral part as a hole, is inserted into the electron beam flow control electrode 34 through a reference hole (not shown).
After positioning with the glass bonding spacer 36 on the bottom, a laser 37 is applied from above the glass bonding spacer 36 to pass through the glass bonding spacer 36 to form the hole 32 at the location of the lateral portion 30 of the electron beam flow control electrode 34. The electron beam flow control electrode 34 and the glass bonding spacer 36 are bonded by melting the surface of the other metal portion 38 and melting the contact portion 39 of the glass bonding spacer 36 or the non-contact portion that is not in complete contact with the reflected heat. Sakuru. Similarly, for the peripheral portion 31, the laser 37 passes through the glass bonding spacer 36 to melt the metal surface other than the hole 33, and the glass bonding spacer 36 is also melted and bonded. In the figure below, the arrows indicate the passage of the laser.

The integrated electron beam flow control electrode 34 and glass bonding spacer 3-6 are combined into a vertical focusing electrode with holes 42 and 43 in the remaining portion 40 or peripheral portion 41, as shown in FIGS. 7 and 8. 44 facing down, the electron beam flow control electrode 34 and the glass bonding spacer 36, which have been joined together, are inverted and placed on the vertical focusing electrode 44, and positioned using the reference hole. At this time, the holes 32 and 33 of the remaining portion 3o of the electron beam flow control electrode 34 or the peripheral portion 31 are arranged so as not to overlap the positions of the holes 42 and 43 of the remaining portion 40 of the vertical focusing electrode 44 or the peripheral portion 41. The laser 37 is passed through the hole 32 of the electron beam flow control electrode 34, and further passed through the glass bonding spacer 36, hitting the surface 46 of the metal portion 450 of the vertical focusing electrode 44 and melting it, and also melting the glass bonding spacer 36. The electron beam flow control electrode 34, the glass bonding spacer 36, and the vertical focusing electrode 44 are now combined into an integrated unit. Further, the horizontal deflection electrode is also made into a unit in the same manner as explained for the electron beam flow control electrode. The electron beam flow control electrode and horizontal deflection electrode that have become a unit can be divided into a part to which a + (plus) charge is applied and a part to which a - (minus) charge is applied by dividing the syslit by a laser as described above. become.

Furthermore, as shown in FIG. 9, the units are combined with holes 6o and tsc in the lateral and peripheral parts (not shown) of the electrodes 47 and 48 of unit A and the electrodes 49 and 66 of unit B; 51° 61' are provided at the same pitch in the Z direction of units A and B, and the holes 50 of the vertical focusing electrode 47 of unit A, the glass bonding spacer 36, and the same pitch holes of the electron beam flow control electrode 48. 56 to the metal surface 52 of the horizontal focusing electrode 49
After melting and bonding with the glass bonding spacer 53, the laser beam is passed through the horizontal deflection electrode 56 of unit B, the glass bonding spacer 64, and the horizontal focusing electrode 49 through the holes 51, 51 of the same pitch. Unit A and unit B are combined by melting the metal surface of the electron beam flow control electrode and melting the glass bonding spacer 63. Further, in the case of further joining the units, the units can be joined together in the same manner as described above using the holes arranged at the same pitch in the Z direction.

These laser welding conditions are Voltage: 300-350V Current: around 1.5A Lens focus: 3QIJIII Feed: 12 silk/sec It is.

In this embodiment, a glass-bonded spacer with holes formed only in the portion through which the electron beam passes is used, but a plurality of parallel plates may be used in the remaining portions.

Second, as in the image display device of the present invention, it is possible to create an electrode unit or a combination of units by combining a metal and an insulator with an insulator between the electrodes using a laser. Therefore, since no adhesive frit is used, bonding can be performed at room temperature without thermal cycling, which eliminates the pitch of expansion and contraction of the electrode slits caused by differences in thermal expansion due to thermal cycling, and also eliminates electrode glue. The accuracy is very good, and horizontal lines do not cause color unevenness in the image. Further, equipment such as an electric furnace required for applying a heat cycle is not required. A(I) is still used to prevent oxidation.
Plating is also not required. Furthermore, since no adhesive frit is used, black spots, which are image defects caused by frit powder falling off, are also eliminated. Furthermore, uneven thickness during frit application is also eliminated. However, since the electrode bonding and electrode slit division can be performed consistently using a laser, the number of man-hours can be significantly reduced. As described above, the present invention can provide large quantities of inexpensive image display devices with improved image quality and significant cost reductions, and has great practical effects.

[Brief explanation of drawings]

Figure 1 is an exploded perspective view of an image display element used in an image display device, Figure 2 is an enlarged plan view of the screen, Figure 3 is an exploded perspective view of electrode manufacturing, and Figure 4 is a cross-sectional view of conventional electrode manufacturing. , FIG. 6 is a plan view of an image display device according to an embodiment of the present invention, FIG. 6 is a cross-sectional view of the same, FIG. 7 is a plan view of a state in which electrodes are connected, and FIG. FIG. 9 is a sectional view showing a state in which the units are joined. 2... Cathode, 2o... Fluorescent material, 9,2
2... Glass container, 23... Bonding spacer, 36, 53° 54... Glass bonding spacer, 37... Laser. Name of agent: Patent attorney Toshio Nakao Haga 1 person No. 4
Figure 2 Figure 5 Figure 6 Figure 7

Claims (1)

[Claims] In an image display device in which a plurality of electrodes are provided between a cathode and a phosphor via a coupling spacer, and the cathode, a plurality of electrodes, and a phosphor are sealed in a glass container, the coupling spacer is made of glass or the like. An image display device in which an insulator is used as a border material, and this bonding space and an electrode are welded together.